<template>
  <el-container class="home-container">
    <!-- 头部区域 -->
    <el-header>
      <div>
        <!-- 黑马logo -->
        <img src="../assets/image//heima.png" alt="">
        <!-- 顶部标题 -->
        <span>电商后台管理系统</span>
      </div>
      <el-button type="info" @click="logout"> 退出 </el-button>
    </el-header>
    <!-- 页面主体区域 -->
    <el-container>
      <!-- 侧边栏 -->
      <el-aside :width="isCollapse ? '64px' : '200px'">
        <div class='toggle-button' @click='toggleCollapse'>|||</div>
        <!-- 侧边栏菜单 -->
        <el-menu unique-opened router :collapse='isCollapse' background-color="#333744" text-color="#fff"
          active-text-color="#409EFF" default-active='activePath' :collapse-transition='false'>
          <!-- 一级菜单 -->
          <el-submenu v-for="item in list" :key='item.id' :index='item.id + ""'>
            <!-- 一级菜单模板 -->
            <template slot="title">
              <!-- 图标 -->
              <i :class="iconsObj[item.id]"></i>
              <!-- 文本 -->
              <span>{{item.authName}}</span>
            </template>
            <!-- 二级子菜单 -->
            <el-menu-item :index="'/' + i.path" v-for='i in item.children' :key='i.id'
              @click="saveNavState('/' + i.path)">
              <!-- 二级菜单模板 -->
              <template slot="title">
                <!-- 图标 -->
                <i class="el-icon-menu"></i>
                <!-- 文本 -->
                <span>{{i.authName}}</span>
              </template>
            </el-menu-item>
          </el-submenu>

        </el-menu>
      </el-aside>
      <!-- 主体结构 -->
      <el-main>
        <router-view></router-view>
      </el-main>
    </el-container>
  </el-container>
</template>

<script scoped>
  export default {
    created() {
      this.getMenuList()
      this.activePath = window.sessionStorage.getItem('activePath')
    },
    data() {
      return {
        list: null,
        iconsObj: {
          125: 'iconfont icon-user',
          103: 'iconfont icon-tijikongjian',
          101: 'iconfont icon-shangpin',
          102: 'iconfont icon-danju',
          145: 'iconfont icon-baobiao'
        },
        // 是否折叠
        isCollapse: false,
        activePath: ''
      }
    },
    methods: {
      // 点击按钮，切换菜单的折叠与展开
      toggleCollapse() {
        this.isCollapse = !this.isCollapse
      },
      logout() {
        //   点击退出清除本地存储并且跳到登录页面
        window.sessionStorage.clear('token')
        this.$router.push('/login')
      },
      //   发起请求
      async getMenuList() {
        const {
          data: res
        } = await this.$axios({
          url: 'menus'
        })
        // 判断是否请求成功
        if (res.meta.status !== 200) return this.$message.error(res.meta.msg)
        // 将请求到的data里的数据赋值给list
        this.list = res.data
        // console.log(this.list)
      },
      saveNavState(activePath) {
        window.sessionStorage.setItem('activePath', activePath)
        this.activePath = activePath
      }
    }
  }

</script>

<style lang='less' scoped>
  .home-container {
    height: 100%;
  }

  .el-header {
    background-color: #373D41;
    display: flex;
    justify-content: space-between;
    padding-left: 0;
    align-items: center;
    color: #fff;
    font-size: 20px;

    >div {
      display: flex;
      align-items: center;
      margin-left: 15px;
    }
  }

  .el-aside {
    background-color: #333744;

    .el-menu {
      border-right: 0;
    }
  }

  .el-main {
    background-color: #eaedf1;
  }

  .iconfont {
    margin-right: 10px;
  }

  .toggle-button {
    background-color: #4a5064;
    text-align: center;
    color: #fff;
    font-size: 10px;
    line-height: 24px;
    letter-spacing: 0.2em;
    cursor: pointer;
  }

</style>
